Marconi’s first radio transmissions, in 1896, were coded signals that were transmitted only about a mile far. Marconi realized that it held huge potential. Marconi was not the first to invent the radio, however. Four years before Marconi started experimenting with wireless telegraph, Nikola Tesla, invented the theoretical model for radio. Tesla tried unsuccessful to obtain a court injunction against Marconi in 1915. In 1943 the US Supreme Court reviewed the decision. Tesla became acknowledged as the inventor of the radio – even though he did not build a working radio.
The earliest radio stations were simply radiotelegraphy systems and did not carry audio. The first claimed audio transmission that could be termed a broadcast occurred on Christmas Eve in 1906, and was made by Reginald Fessenden. Whether this broadcast actually took place is disputed.
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